Ankle joint



FIG. 1 is a perspective view of an ankle joint showing the design;

FIG. 2 is a first side view of the device illustrated in FIG. 1;

FIG. 3 is a second side view thereof;

FIG. 4 is a first end view of the device shown in FIGS. 1-3;

FIG. 5 is a second end view thereof;

FIG. 6 is a top view of the device illustrated in FIG. 1; and,

FIG. 7 is bottom view thereof.

The portions of the ankle joint shown in broken lines in the drawingsform no part of the claim.

CLAIM I claim the ornamental design for an ankle joint, as shown anddescribed.